Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of kinase inhibitors for cancer treatment. Its structure allows for selective modification, making it valuable in creating compounds with high biological activity. Commonly employed in research settings to design drugs targeting tyrosine kinases involved in tumor growth and inflammation. Also utilized in agrochemical research for developing new pesticides due to its ability to interact with specific enzyme systems in pests. Its halogenated quinazoline core provides a stable platform for further functionalization in medicinal chemistry.